LTM2893-1 Datasheet | Analog Devices

FEATURES nn Isolated Interface: 6000VRMS for 1 Minute nn CSA (IEC/UL) Approved, File #255632 nn 100MHz SPI-patible I/O nn Configurable SPI Word Length 8 to 32 Bits nn Low Jitter Conversion Start (30ps RMS) nn Supports Simultaneously Sampled ADCs nn Read Only (LTM2893), Read/Write (LTM2893-1) nn Three Isolated Multiplexer Select Signals nn 1.71V to 5.5V I/O Voltages nn 3V to 5.5V Supply Voltages nn High mon Mode Transient Immunity nn 15mm × 6.25mm BGA Package APPLICATIONS nn Remote Sensing nn High Speed Data Acquisition nn Industrial Process Control nn Test and Measurement Equipment All registered trademarks and trademarks are the property of their respective owners. LTM2893/LTM2893-1 100MHz Isolated ADC Serial Interface DESCRIPTION The LTM®2893 is a high speed isolated μModule (micromodule) SPI interface with ADC control signals. The LTM2893 is optimized for isolating 1Msps high resolution 18-bit SAR ADCs, such as the LTC2338 and similar families, and can interface with most general purpose ADCs. The LTM2893-1 is optimized for isolating the LTC2348 and similar families of simultaneous sampling ADCs that require writing configuration settings into the ADC. LTM2893 isolates the conversion start, sampling signal, with very low aperture jitter (30ps) and low latency (20ns). The interface enables fast throughput with no cycle latency, which makes the LTM2893 ideally suited for a wide variety of applications. The LTM2893 has a high speed SPI-patible serial port that supports 1.71V to 5.5V logic and is configurable for ADCs with 8 to 32 bit SPI word lengths. It also isolates three select signals (SA, SB, SC) for controlling analog multiplexers or gain settings. The isolation barrier tolerates large voltage ground variations between the logic interface and the isolated side of the LTM2893. Uninterrupted munication is maintained during voltage transients greater than 50k V/µs. TYPICAL APPLICATION LTC2328-18 ADC Isolation AIN = ±10.24V, SNR = 95d B 3.3Vi 5Vi...